samba-mirror/lib/fuzzing/fuzz_parse_lpq_entry.c

/*
   Fuzzing parse_lpq_entry
   Copyright (C) Douglas Bagnall <dbagnall@samba.org> 2021

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
#include "../../source3/include/includes.h"
#include "printing.h"
#include "fuzzing/fuzzing.h"


int LLVMFuzzerInitialize(int *argc, char ***argv)
{
	return 0;
}

#define MAX_LENGTH (1024 * 1024)
char line[MAX_LENGTH + 1];

int LLVMFuzzerTestOneInput(const uint8_t *input, size_t len)
{
	enum printing_types printing_type;
	print_queue_struct pq_buf = {0};
	print_status_struct status = {0};
	bool first;
	unsigned x;
	TALLOC_CTX *frame = NULL;

	if (len < 1 || len > MAX_LENGTH) {
		return 0;
	}

	x = input[0];
	input++;
	len--;

	/* There are 14 types, default goes to bsd */
	printing_type = x & 15;
	first = (x & 16) ? true : false;

	memcpy(line, input, len);
	line[len] = '\0';

	/* parse_lpq_bsd requires a stackframe */
	frame = talloc_stackframe();

	parse_lpq_entry(printing_type,
			line,
			&pq_buf, /* out */
			&status, /* out */
			first);
	talloc_free(frame);
	return 0;
}